Ichneumon stramentarius Gravenhorst, 1820

Ichneumon stramentarius Gravenhorst, 1820 View in CoL

Notes

Similar to I. suspiciosus . Both species have the last three apical segments covered with a white spot, a yellow band on the hind tibia and T 2 - T 3 orange to red. I. stramentarius usually has more flagellomeres, a narrow patch of hairs on the hind coxa, the hind tarsus broadened and also often has tinges of yellow shining through the second and third tergite. Usually, the number of specimens clustering together is lower. Records (126) of 232 specimens could not be included. These records possibly contain new hibernation records for the Czechia, Latvia, Lithuania, Norway and Poland. Both species are well distributed through Europe. In some countries (e. g. Belgium, France), I. suspiciosus seems to be more common, while in others (e. g. United Kingdom), this is vice-versa. The common continental subspecies is called ssp. stramentarius , in Scandinavia spp. septentrionalis occurs, having the legs much redder. Unfortunately, some of the older records possibly relate to I. stramentor , as this species was only described in 1981. For example, Valemberg uses I. septentrionalis - atrifemur to refer to I. stramentarius and I. stramentarius to refer to I. stramentor . For some authors, the species concept was unclear and the data were not included (e. g. Leclercq (1942), Aubert (1960)).

Status: Confirmed.

Records: Belarus (7), Belgium (10), Czechia (1) *, Denmark (2) **, Finland (2) *, France (12), Germany (6), Norway (12) *, Russia (3), Sweden (2) *, the Netherlands (1) *, United Kingdom (17).

First record: Ca. 1871 ( Tischbein (1871), Germany).

Hibernacula: C (5), DT (88), DTCL (4), LV (2), M (4), S (1), U (6).

Sources: Tischbein (1871), Berthoumieu (1894), Pic (1916) and Pic (1917), Seyrig (1923) and Seyrig (1926 b), Perkins (1952) [ I. septentrionalis scelestus ], Valemberg and Vago (1974 a) [ I. macrocérophorus D. T.], Valemberg (1982) [ I. septentrionalis - atrifemur D. T.], Gokhman (1987), Sebald et al. (2001), Schmidt and Zmudzinski (2005), Valemberg and Vago (2013), Verheyde and Quicke (2022); Unpublished: Artportalen, Artsobservasjoner, Coll. RBINS, iNaturalist, iRecord, Naturbasen, Observation. org., Pers. obs., Tereshkin (2014).

Also mentioned in: Tischbein (1873 b), Constantineanu (1959), Tereshkin (2002), Gokhman (2003).